How to convert the received email as html format to plain text ?

[Electrolyt]

Hi mobiz,

i want to download the text context of new received emails with your great library.
If the mcu gets the raw text, they is able to collect commandos as words in stringformat.
When the microcomputer received emails in text-format
(imap_data.enable.text = true), the carrige returns between the lines are missing.
That's why words are put together.
Because of this I want to get the HTML message (imap_data.enable.html = true)
and later extract the raw text with line breaks and spaces between words.
Do you now a simple existing solution for that ?

Best greetings,
electrolyt

Build tool used:
Arduino IDE 2.2.1

• Arudino
• Platformio (Visual Studio Code plugin)
• Platformio CLI
• Other

Board used (ESP32/ESP8266/Arudino):
Seeeduino Xiao ESP32-S3

• ESP8266-based
• ESP32-based

Other Libraries That are used:
<AsyncElegantOTA.h>
<ESPmDNS.h>
<WiFi.h>

Description of problem:
See above.

[mobizt]

I don't get what is your problem and requirement as you still get all characters included line break in both text and html.

There is no missing octet (byte) of message body and attachment that fetched from your mailbox as the response size is known.

[mobizt]

The text string that includes the line break should be something like this

There are many variations of passages of Lorem Ipsum available, \r\nbut the majority have suffered alteration in some form, by injected\r\n humour, or randomised words which don't look even slightly believable.

Which will be displayed as

There are many variations of passages of Lorem Ipsum available,
but the majority have suffered alteration in some form, by injected
humour, or randomised words which don't look even slightly believable.

[mobizt]

To get text from html, you need the HTML parser which may be available as C/C++ library which the code size may not fit with flash space or requires other dependencies.

[Electrolyt]

i will show you one example of an email. This email was bild with

This is the complete email text per Text (msg.text.content):

Line 1Line 2Line 3Gesendet von Mail für Windows

This is the complete email text per HTML (msg.html.content):

What i wish is this text with line breaks:

Line 1
Line 2
Line 3

Gesendet von Mail für Windows

I didn't download the messages as file in the filesystem. I only use the variables for the messages and write a serial logging. I haven't the line breaks within the variable msg.text.content. Am I misinterpreting something?

[Electrolyt]

Maybe a html parser is realy necessary, but i feel, this is to complex for my "small" issue.
And it's to complex for the mcu ?

[mobizt]

It depends on the text message you sent to your inbox.

You can verify what actually SMTP server sent to you by see the message source in your mail app.

[Electrolyt]

Yes, you are right. I could choose the mail format in the application.
HTML or Text. But i want it flexible...
So i will send in the future a mail from different mail-applicatons like MS office,
Web Service Mail Provider, Smartphone Android, Apple Iphone, Laptop @ Work etc.
And it will be used from different persons. My wife, my daughter and me.
So i need a universal and flexible solution.

[mobizt]

Instead of relying on the line break that mail app may reformat or ignore it, you can use some special character as the string separator e.g. | like this.

Line 1|Line 2|Line 3

Then split it into multiple strings when you read the message.

[Electrolyt]

Yes, this would be the simplest solution. I will think about it.
I can't understand, while the mail apps deleteing the line breaks.
This will create longer wrong word's if there are no spaces, point's etc. between the words.
A linebreak seperate also the words.
However.. It is like it is..